Methylcellulose (MC) bụ ihe eji eme ihe na-emepụta kemịkalụ polymer, ether cellulose emezigharịrị enwetara site na methylating eke cellulose. N'ihi njirimara anụ ahụ na kemịkal pụrụ iche, a na-eji ya eme ihe n'ọtụtụ ebe na-ewu, nri, ọgwụ, ihe ịchọ mma, akwụkwọ na mkpuchi.
1. Nhazi site na ogo nke nnọchi
Ogo nke nnọchi (DS) na-ezo aka na nkezi uru nke otu hydroxyl nke otu methyl nọchiri anya na nkeji glucose ọ bụla dị na methylcellulose. Enwere otu hydroxyl 3 na mgbanaka glucose ọ bụla nke molekul cellulose nke nwere ike iji otu methyl dochie ya. Ya mere, ogo nke nnọchi nke methylcellulose nwere ike ịdịgasị iche site na 0 ruo 3. Dị ka ogo nke nnọchi, methylcellulose nwere ike kewaa ụzọ abụọ: ogo dị elu nke ngbanwe na ọkwa dị ala nke nnọchi.
Ọkwa dị elu nke nnọchi methylcellulose (DS> 1.5): Ụdị ngwaahịa a nwere ọkwa dị elu nke nnọchi methyl, ya mere ọ bụ ihe ọzọ hydrophobic, nwere obere solubility na ezigbo mmiri na-eguzogide. A na-ejikarị ya eme ihe na ihe owuwu ụlọ, mkpuchi na oge ndị ọzọ na-achọ ụfọdụ ogo hydrophobicity.
Ọkwa dị ala nke nnọchi methylcellulose (DS <1.5): N'ihi obere nnọchi methyl, ụdị ngwaahịa a na-abawanye hydrophilic, nwere ike ịgbaze nke ọma na enwere ike ịgbaze na mmiri oyi. A na-eji methylcellulose dị ala dochie anya n'ọtụtụ ebe na nri na ụlọ ọrụ ọgwụ dị ka ihe na-agba agba, emulsifier na stabilizer.
2. Nhazi site na iji
Dị ka iji methylcellulose na mpaghara dị iche iche, ọ nwere ike kewaa ụzọ abụọ: methylcellulose mmepụta ihe na nri na methylcellulose ọgwụ.
Industrial methylcellulose: A na-ejikarị eme ihe na-ewu ụlọ, mkpuchi, akwụkwọ mpempe akwụkwọ, ceramics na ụlọ ọrụ ndị ọzọ dị ka thickener, nrapado, ihe nkiri mbụ, onye na-ejigide mmiri, wdg N'ime ụlọ ọrụ na-ewu ụlọ, a na-eji methylcellulose mee ihe na ciment na ngwaahịa gypsum iji melite arụmọrụ ụlọ na ịdịte aka; na ụlọ ọrụ mkpuchi, methylcellulose nwere ike ịbawanye nkwụsi ike na mgbasa nke mkpuchi.
Nri na ọgwụ methylcellulose: N'ihi ihe ndị na-adịghị egbu egbu na nke na-adịghị emerụ ahụ, a na-eji methylcellulose mee ihe dị ka ihe mgbakwunye na nri na ọgwụ. Na nri, methylcellulose bụ ihe a na-ahụkarị na emulsifier nke nwere ike ime ka usoro nri kwụsie ike ma gbochie stratification ma ọ bụ nkewa; N'ime ụlọ ọgwụ, a pụrụ iji methylcellulose mee ihe dị ka shea capsule, onye na-ebu ọgwụ, ma nweekwa ọrụ nke ọgwụ na-ahapụ ya. Nri ya na nchekwa ya na-eme methylcellulose ewu ewu na mpaghara abụọ a.
3. Nhazi site na solubility
A na-ekewa Methylcellulose ụzọ abụọ n'usoro nke solubility: mmiri oyi soluble ụdị na organic mgbaze ụdị.
Mmiri oyi soluble methylcellulose: Ụdị methylcellulose a nwere ike igbari na mmiri oyi ka ọ bụrụ ihe ngwọta na-egbuke egbuke, nke na-egbuke egbuke mgbe ọ gbasasịrị. A na-ejikarị ya eme ihe na nri na ụlọ ọrụ ọgwụ dị ka ihe na-agba agba ma ọ bụ ihe nkiri mbụ. Solubility nke ụdị methylcellulose a na-ebelata na okpomọkụ na-arịwanye elu, ya mere enwere ike iji njirimara a mee ihe maka njikwa ihe owuwu mgbe ejiri ya na ụlọ ọrụ ihe owuwu.
Organic mgbaze soluble methylcellulose: Ụdị methylcellulose a nwere ike igbari na organic solvents ma na-ejikarị na agba, mkpuchi na ndị ọzọ ulo oru ubi na-achọ organic usoro mgbasa ozi. N'ihi ihe dị mma na-emepụta ihe nkiri na nguzogide kemịkalụ, ọ dị mma maka iji ya n'okpuru ọnọdụ ụlọ ọrụ siri ike.
4. Nhazi site na arọ molekụla (viscosity)
Ibu arọ nke methylcellulose nwere mmetụta dị ịrịba ama na njirimara anụ ahụ ya, karịsịa arụmọrụ viscosity na ngwọta. Dị ka ịdị arọ molekụla si dị, methylcellulose nwere ike kewaa n'ime ụdị viscosity dị ala na ụdị viscosity dị elu.
methylcellulose viscosity dị ala: arọ molekụla dị ntakịrị na viscosity ngwọta dị ala. A na-ejikarị ya na nri, ọgwụ na ihe ịchọ mma, tumadi maka emulsification, nkwusioru na ndim. methylcellulose na-adịghị ala ala nwere ike ịnọgide na-enwe ezigbo mmiri na ịdị n'otu, ọ dịkwa mma maka ngwa ndị chọrọ ngwọta obere viscosity.
Elu-viscosity methylcellulose: O nwere nnukwu ibu molekụla ma na-emepụta ihe ngwọta dị elu mgbe ọ gbasasịrị. A na-ejikarị ya eme ihe na ihe owuwu ụlọ, ihe mkpuchi na ụlọ ọrụ mmepụta ihe. methylcellulose nwere viscosity dị elu nwere ike ịbawanye ike nrụpụta nke ọma, na-eyi nguzogide na adhesion nke ihe ngwọta, ya mere a na-eji ya eme ihe na ihe ndị chọrọ ike dị elu na nkwụsi ike dị elu.
5. Nhazi site na ogo mgbanwe kemịkalụ
Methylcellulose bụ ihe mwepụta cellulose emezigharịrị na kemịkal. Dị ka usoro mgbanwe na ogo, ọ nwere ike kewaa ya na otu methyl cellulose na composite modified cellulose.
Single methyl cellulose: na-ezo aka cellulose ethers bụ nanị methyl dochie. Ụdị ngwaahịa a nwere njiri anụ ahụ na kemịkalụ kwụsiri ike, yana solubility ya, njupụta na imepụta ihe nkiri dị mma.
Cellulose emezigharịrị ihe mejupụtara: Na mgbakwunye na methylation, a na-agwọkwa ya na kemịkalụ ọzọ, dị ka hydroxypropylation, ethylation, wdg, iji mepụta ngwaahịa emezigharịrị agwakọta. Dịka ọmụmaatụ, hydroxypropyl methylcellulose (HPMC) na carboxymethyl cellulose (CMC). Seluloses ndị a na-agbanwe agbanwe na-enwekarị mmiri solubility dị mma, nguzogide okpomọkụ na nkwụsi ike, ma nwee ike ime mgbanwe n'ọtụtụ dịgasị iche iche nke mkpa ụlọ ọrụ.
6. Nhazi site na ngwa ngwa
Ngwa obosara nke methylcellulose na-enye ohere ka ekewa ya dịka njirimara ngwa ya na ụlọ ọrụ dị iche iche.
Ụlọ ọrụ ihe owuwu methylcellulose: A na-ejikarị ya na ciment na ihe ndị dabeere na gypsum dị ka ihe na-ejigide mmiri na ihe na-esi ísì. Ọ nwere ike melite arụmọrụ nke ihe owuwu ụlọ, gbochie mmiri mmiri n'oge, na ịbawanye ike nke ngwaahịa emechara.
Ụlọ ọrụ nri methylcellulose: Dị ka emulsifier, thickener na stabilizer na nhazi nri. Ọ nwere ike igbochi mfu mmiri, melite uto na nhazi nke nri, ma nwekwuo ndụ nchekwa nri.
Ụlọ ọrụ na-emepụta ọgwụ methylcellulose: Dị ka mbadamba mbadamba ma ọ bụ ihe na-ahapụ maka ọgwụ. A pụkwara iji Methylcellulose mee ihe n'ịkwadebe ọgwụ eriri afọ dị ka onye na-ebu ọgwụ dị mma ma dị irè.
Ụlọ ọrụ ịchọ mma methylcellulose: Na ngwaahịa nlekọta anụ ahụ na ihe ịchọ mma, a na-eji methylcellulose mee ihe dị ka thickener, emulsifier na moisturizer iji nyere ngwaahịa aka ịmepụta ọdịdị dị nro ma dị nro ma na-agbatị mmetụta na-ekpo ọkụ.
Na nchịkọta, e nwere ọtụtụ ụzọ na-ekewa methylcellulose, nke nwere ike nkewa dị ka ya kemịkalụ Ọdịdị Njirimara, ma ọ bụ dị ka ngwa ngwa ubi na solubility Njirimara. Ụzọ nhazi ọkwa ndị a dị iche iche na-enyere anyị aka ịghọta nke ọma njirimara na ọrụ nke methylcellulose, ma na-enyekwa usoro nhazi maka ntinye ya n'akụkụ dị iche iche.
Oge nzipu: Ọktoba 23-2024